*{
    margin: 0;
    padding: 0;
    list-style: none;
}
/* 导航栏 */
.nav{
    /* position: relative; */
    /* float: right; */
    height: 60px;
    width: 100%;
    margin: 0 auto;
    background: linear-gradient(45deg,rgb(44, 53, 63),rgb(93, 97, 105))
}
.page>img{
    margin: 0 40px;
    float: left;
    /* top: -10px; */
    width: 200px;
    height: 60px;
}
a{
    color:rgb(14, 16, 32);
    display: block;
    text-decoration: none;
}
.nav li{
    left: 50px;
    position: relative;
    width: 10%;
    height: 100%;
    line-height: 60px;
    letter-spacing: 2px;
    float: left;
    /* color: rgb(30, 36, 61); */
    margin: 0 auto;
    text-align: center;
    cursor: pointer;

}
.nav>li>a:hover{
    color: rgb(228, 243, 255);
    background-color: rgb(53, 70, 107);
}
.top>img{
    width: 100%;
}
/* main */
.main>img{
    width: 100%;
    height: 650px;
    background: url("../images/back.jpg") no-repeat;
    /* background: no-repeat; */
    background-size: cover;
    filter: blur(8px);
    position: relative;
}
/* header */
.header{
    position: absolute;
    left: 15%;
    top: 135%;
    width: 70%;
    /* margin: 0 auto; */
}
.header>p{
    text-shadow: 5px 5px 10px rgb(57, 74, 90);
    font-size: 30px;
    line-height: 100px;
    text-align: center;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    letter-spacing: 5px;
    color: rgb(19, 36, 51);
}
.header-left{
    width: 25%;
    height: 360px;
    float: left;
    background-color: rgb(57, 63, 68);
    opacity: 0.7;
}
.header-left>ul>li{
    margin: 12px;
}
.header-left>ul>li>p{
    font-size: 16px;
    text-align: 25px;
    letter-spacing: 2px;
    color: rgb(255, 255, 255);
}
.header-left>ul>li>p>span{
    float: right;
}
/* 轮播 */
.banner {
    width: 75%;
    height: 360px;
    float: right;
    box-sizing: content-box;   /*将border和padding数值包含在width和height中*/
}

.banner .banner-wrapper {
    position: relative;      /*相对定位*/
    width: 100%;
    height: 100%;
    overflow: hidden;
    /* z-index: -1; */
}
.banner-list {
    position: absolute;
    left: 0;
    top: 0;
    width: 4000px;
    height: 100%;
    padding: 0;
    margin: 0;
    /* list-style: none; */
    animation: banner-swipe 15s ease-in infinite;
}
.banner-list .item {
    float: left;
    width: 800px;
    height: 100%;
    background-color: rgb(169, 152, 179);
}

.banner-list .item img {
    width: 100%;
    height: 100%;
    opacity: 0.9;
}

@keyframes banner-swipe {   
    0% {
        left: 0;
    }

    23% {
        left: 0;
    }

    25% {
        left: -800px;
    }

    48% {
        left: -800px;
    }

    50% {
        left: -1600px;
    }

    73% {
        left: -1600px;
    }

    75% {
        left: -2400px;
    }

    98% {
        left: -2400px;
    }

    100% {
        left: -3200px;
    }
}
/* footer */
.footer{
    position: relative;
    width: 100%;
    height: 200px;
    background-color: rgb(98, 98, 100);
}
.footer>img:nth-child(1){
    position: absolute;
    left: 90px;
    top: 40%;
    width: 120px;
    padding-right: 20px;
    border-right: 2px rgb(245, 242, 242) solid;
}
.footer>img:nth-child(2){
    position: absolute;
    left: 250px;
    top: 25%;
    width: 120px;
}
.footer>ul>li{
    margin: 30px 0 0 0;
    color: rgb(253, 251, 251);
    padding: 0 10px;
    border-right: 2px solid rgb(247, 242, 242);
    float: right;
    cursor: pointer;
}
.footer>ul>li:nth-child(1){
    padding-right: 25%;
}
/* footer 图标 */
.bottom a{
    position: relative;
    width: 100%;
}
.bottom a span{
    /* right: 90px; */
    top: 80px;
    font-size: 30px;
    position: absolute;
}
.bottom a:nth-child(1) span{
    right: 50%;
}
.bottom a:nth-child(2) span{
    right: 45%;
}
.bottom a:nth-child(3) span{
    right: 40%;
}
.bottom a:nth-child(4) span{
    right: 35%;
}